java.lang.RuntimeException: while converting TUMBLE_START(`MyTable`.`rowtime`, INTERVAL '15' MINUTE)
at org.apache.calcite.sql2rel.ReflectiveConvertletTable$2.convertCall(ReflectiveConvertletTable.java:134)
at org.apache.calcite.sql2rel.SqlNodeToRexConverterImpl.convertCall(SqlNodeToRexConverterImpl.java:61)
at org.apache.calcite.sql2rel.SqlToRelConverter$Blackboard.visit(SqlToRelConverter.java:4415)
at org.apache.calcite.sql2rel.SqlToRelConverter$Blackboard.visit(SqlToRelConverter.java:3783)
at org.apache.calcite.sql.SqlCall.accept(SqlCall.java:137)
at org.apache.calcite.sql2rel.SqlToRelConverter$Blackboard.convertExpression(SqlToRelConverter.java:4317)
at org.apache.calcite.sql2rel.SqlToRelConverter.createAggImpl(SqlToRelConverter.java:2723)
at org.apache.calcite.sql2rel.SqlToRelConverter.convertAgg(SqlToRelConverter.java:2541)
at org.apache.calcite.sql2rel.SqlToRelConverter.convertSelectImpl(SqlToRelConverter.java:654)
at org.apache.calcite.sql2rel.SqlToRelConverter.convertSelect(SqlToRelConverter.java:616)
at org.apache.calcite.sql2rel.SqlToRelConverter.convertQueryRecursive(SqlToRelConverter.java:2951)
at org.apache.calcite.sql2rel.SqlToRelConverter.convertQuery(SqlToRelConverter.java:552)
.....
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.calcite.sql2rel.ReflectiveConvertletTable$2.convertCall(ReflectiveConvertletTable.java:131)
... 42 more
Caused by: java.lang.AssertionError
at org.apache.calcite.sql2rel.SqlToRelConverter$Blackboard.getRootField(SqlToRelConverter.java:4132)
at org.apache.calcite.sql2rel.SqlToRelConverter.adjustInputRef(SqlToRelConverter.java:3446)
at org.apache.calcite.sql2rel.SqlToRelConverter.convertIdentifier(SqlToRelConverter.java:3421)
at org.apache.calcite.sql2rel.SqlToRelConverter.access$1800(SqlToRelConverter.java:207)
at org.apache.calcite.sql2rel.SqlToRelConverter$Blackboard.visit(SqlToRelConverter.java:4424)
at org.apache.calcite.sql2rel.SqlToRelConverter$Blackboard.visit(SqlToRelConverter.java

Additionally, tests were added to
SqlToRelConverterTest.xml but not to SqlToRelConverterTest.java. We've
been running without tests.